基于C#的餐厅点餐系统的设计与实现

以下是一个基于C#的餐厅点餐系统的设计与实现的示例代码和代码注释：

csharp
using System;
using System.Collections.Generic;

// 菜品类
public class Dish
{
    public string Name { get; set; }
    public double Price { get; set; }
}

// 订单类
public class Order
{
    public int TableNumber { get; set; }
    public List Dishes { get; set; }
    public double TotalPrice { get; set; }
}

// 餐厅类
public class Restaurant
{
    private List menu; // 菜单
    private List orders; // 订单列表

    public Restaurant()
    {
        menu = new List();
        orders = new List();
    }

    // 添加菜品到菜单
    public void AddDishToMenu(Dish dish)
    {
        menu.Add(dish);
    }

    // 显示菜单
    public void DisplayMenu()
    {
        Console.WriteLine(Menu:);
        foreach (Dish dish in menu)
        {
            Console.WriteLine(${dish.Name} - ${dish.Price});
        }
    }

    // 下订单
    public void PlaceOrder(Order order)
    {
        // 计算订单总价
        double totalPrice = 0;
        foreach (Dish dish in order.Dishes)
        {
            totalPrice += dish.Price;
        }
        order.TotalPrice = totalPrice;

        // 添加订单到订单列表
        orders.Add(order);

        Console.WriteLine($Order placed for table {order.TableNumber}. Total price: ${order.TotalPrice});
    }

    // 显示订单列表
    public void DisplayOrders()
    {
        Console.WriteLine(Orders:);
        foreach (Order order in orders)
        {
            Console.WriteLine($Table {order.TableNumber}: ${order.TotalPrice});
        }
    }
}

public class Program
{
    public static void Main(string[] args)
    {
        // 创建餐厅对象
        Restaurant restaurant = new Restaurant();

        // 添加菜品到菜单
        Dish dish1 = new Dish { Name = Steak Price = 20 };
        Dish dish2 = new Dish { Name = Salad Price = 10 };
        Dish dish3 = new Dish { Name = Soup Price = 8 };
        restaurant.AddDishToMenu(dish1);
        restaurant.AddDishToMenu(dish2);
        restaurant.AddDishToMenu(dish3);

        // 显示菜单
        restaurant.DisplayMenu();

        // 下订单
        Order order1 = new Order { TableNumber = 1 Dishes = new List { dish1 dish2 } };
        Order order2 = new Order { TableNumber = 2 Dishes = new List { dish3 } };
        restaurant.PlaceOrder(order1);
        restaurant.PlaceOrder(order2);

        // 显示订单列表
        restaurant.DisplayOrders();
    }
}